Lock



May 7; 1935- J, w. Frrz GERALD 2,000,280 y Loox Filed Nov. 5, 1934Y Y Il'J7/7H W15/250m@ V "k-72 I (En il May 7 1935 l 2,000,280

' Application November 5, 1934, l l 13 (CUM-910i y t I. This inventionrelates to new and useful imas by an unauthoizedattempttdmanipulaietheprovementsinlocksand particularly to that type lock.- j 1 y f- A 1 ofcylinder lock now commonly used in door han Referring nowmore-particularly to the acdies of automobiies'wherein the drivingmembercompanying drawing inwhich like numerals in- 5 or handle has noconnection 4with the latching dicate like vparts throughout theseveralviews, li5

mechanism in the locked condition. Athe numeral 5 designates partoffanautomobile Previous to the present invention, lby driving ,door handlewhich is provided witha series of a suitable implement into the keywayand applyaxially aligned and communicating bores 8,1 'and ing torsion tothe cylinden'the locking'effect of 8, of successively smaller diameter.,l y

I0 the lock could be overcome and a suillcient con- Mounted in the-outer bores 8 and 1' is the 10 nection between the driving niembe'i andlatchshell or casing lof a conventional cylinder'A lock ing mechanismcould be obtained to enable acincluding a cylinderl'diSpOSedWithin'theBhnll' tuation of the latter, or casing, andtumblers (not shown) adapted to- Itis therefore a broad object of thisinvention lock the oylinderazainst rotation in the shell.- in to providea locking unit or the character dethe tumblers being retraotiblefby a'proper key 15 l scribed v'which is so constructed that thepercusinsertnble into a keyway U t0 free'the Uyuni? sion force on theend of the lockcylinder incider fOr rotation Y, n Y l dental to anattempt at unauthorized manipu- The Shell 0r 6351118 9 isruitably heldlation of the lock positively secures its bolt against rotation in thebOlBS 3 and 7 Of the (1001 hnndle,

B0' actuation and thereby effectively precludes the esbut 1S free t0Shift longitudinally for a Purpose 20 tablishment of a. drivingconnection between the t0 be helenftel described-f Normally the Shell,driving member and the latch mechanism. and consequently the entireCylinder lock Stlnof More specifically itis an object of'this inven`ture, iS yeldinly mintined in its OnteinlOSt tion to provide .a lockwherein` any attemptedl position with the outer end ofthe cylinder nosh2li`l unauthorized manipulation of the lock `cylinder With the Outerface 0f the door hnndleb! ill-Spring `2li which entails driving animplement intothe lock il, connned between lthey inner'end 'of` :theShell keyway',`shears a frangible pin'and effects a conand the19017150111L 0f the bore "l: fr; nection between the stem of the 'lockcylinder and The 100k Cylinder. W has a Stem u, Pl'OectmE its boit topositiveiy secure the bolt against actu,. from its inner end to bereceived in the innermost ation by a driving maribeln n Y bore l. Theinner endo! thisvstem has ana`nnu. 3Q

" with the above and other objects inview which 1er groove l5 inwhieh epin l0 viixed in the 'adwii1-appear 'as the description proceeds, thisin v jacent B01171011` 0f 'the 100i handle 18 receivedvention resides inthe novel construction, combi; The Pin-'31111011811' engagement withthelmn??? nation and arrangement of .parts substantially as Wall 0f,.thggmove 5 lim-75' the Qutwad' 1033i' hereinafter described and moreparticularly dejtudinl P'leOjeCtiOnOf the 100k iinitby 188911118 35 nnedby the appended claims, it being understood ilnd is 0i Summer Width i0.Permit. 1o degree.V that s'uchch'anges in the precise 'embodiment ofOf'mwardlongitudiml shifting 0f the'assembled the hereindisclosedinventionmay bevmade asV 10d! for 8 DnI'DOSe t0 be hel'einl de'. comewithin-the scope of the claims. A, f Sel'ibed l o o The accompanyingdrgwlngulustrates (,Ileccxn The innermost end' 0f :the Stem S reduced in40 plete exampie of the physical embodiment or the diameter 'and has e0011er i' fixed thereto by e invention constructed according to the bestmode frangible shear Pin '.8 m a Position at* which sol-fmdevlsed forthe practical appllcatlonm the the end of the stem is ilush with theadjacent principles thereof, 'andln which: inner face of the collar.Thisinner face oil the Figure 1 15 o, View substantially ln longltudlnalcollar bears against the cylindrical surface of a 45 sootion through onautomobile door handle lllus locking bolt I9 siidable in a transversebore 20 trating the application of this invention thereto; in theadjacent handle partj f ll'igureZisanenlarged longitudinal section viewProjecting from the inner face 0f the 00u31' l of the inne!- ond ofthehandle showing the bolt I1 is an eccentric v'driving cam 2| whichprojects lockedagainst actuation; i l into an annular groove 22 in thelocking bolt 60 .Home 3 ig'grpergpective view of the inner end 'so thatupon rotation of the stem il effected of thelock'stem' showing itsdriving connection by manipulation of the key, the bolt -is actuatedwith the bolt; and y longitudinally to and from an operative position,Figure! is atperspective view similar toFigure projectingone end thereoffrom the adjacent 5I 3 but showing the bolt lockedagainst actuation endof the bore 20 for engagement with a latch- .55

- application ofv torsional force nection between such implement andthekeyway ing mechanism, not shown, lto effect a driving, connectionbetween the handle and the latching mechanism.

Normally the lock cylinder is yieldingly held in a position of rotationholding the locking bolt in its inoperative position with `its endssubstantially ilush with the ends of thebore in which it operates, by atorsion spring 23. The spring 23 is coiled about the stem. Il adjacentits attachment' to the cylinder and has its ends hooked over abutmentson the lock cylinder and thev sleeve or casing 9. Inasmuch as thismanner oi holding the lock cylinder in its normal locked position ofrotation forms no part of this in- `vention and is in accordancey withconventional practice, it has not been shown in detail. i

In-operation, thelatching mechanism to be actuated is operableto itsreleased or unlocked position by the application o! turning forcethereon through the medium ofthe handle when the locking bolt isprojected lto itsfoperative position by rotationof -the lock unit.Ordinarily, such rotation of the cylinder is eiectedby the use of aproper key. Y

It an unauthor dattempt is made to manipulate the lockas by theinsertion of an implement into the outer end of the keyway and thethereon, the conto be ,adequate to enable the transmission or therequisite turning'torce to the cylinder, requires that the implement beforcibly driven into the kyway. i I

During the applicationof the percussion force incidental to the drivingof an implement into the keyway, the frangible shear pin shears oii,thus freeing the collar I1 for rotation with re-v4 spect to thestem,7and permitting the projection of the inner end of the stern intothe annular groove!! in the locking bolt as vshown in Figure 2.

This results from `the fact that the percussion force acting to drivethe lock unit and consequently the stem i4 inwardly is takenup solely bythe abutment 'of the collar I1 against the locking bolt I8, the -annulargroove 2l in the bolt being ofsunicient widthfto receive the inner endof the stem.

Hence, upon shearing of the pin I8 and inward endwise movement ofthestem, actuation of the` locking bolt to its operative position becomesutterly impossible. i

The projection of the locking bolt to operative position being thusprecluded, it follows that driving connection between the handle and thelatching mechanism cannot be eilected.

What I claim as my inventionis:

1. Inalock of the character described, a locking bolt,a key operablelockcylinder, and a driving connection between the cylinder and the-lock?.ing bolt Afor translating rotation of the cylinder into'llnear movementon the part of thelocking bolt, said connectionv including a frangiblepartl adapted ,to give way under a percussive force applied to thecylinder so as to render the locking bolt inoperable by subsequentrotation of .the

cylinder. f Y y 2. In a lock of the character described, an

cylinder, aconnection between the lock cylinder, and the locking boltwhereby the bolt is movable endwise by rotation of the cylinder, saidconnectibnincluding afrangibl'e part adapted to give way under apercussive force applied to the cylinder which-results in an endwisemovement ofthe driving bolt inoperable by the cylinder.

part, said frangible means being adapted to give way under the iniluenceoi a percussive force applied to the cylinder so as to tree theeccentric member from the cylinder and render the vi. m a. lock or thecharacter described, a, mounting member, a locking bolt mounted forendwise movement in the mounting member, op-

erating means for the bolt, and a connection between the operating meansand the bolt for tramiating rotation of the operating means into endwisemovement'on the part of the bolt, said connection including a frangibiepart adapted to give way under a percussive force so as torender thebolt inoperable by said operating means.

5. In a lock Vof the character described, a

: manually operable driving member for transmitting motion to mechanismto be actuated, a locking' bolt carried by the driving member andprojectable endwise to a position aiording a connection between thedriving member and mechanism to be actuated thereby, operating meansmounted inthe driving member for projecting the locking 1 bolt toitsoperative position, anda connection between the operating means; andthe locking bolt adapted to give way under a percussive torce -so'as torender the locking bolt subsequently inoperable.

6. In a lock of the charactervdescribed, a driving member aiiording alock housing and adapted for imparting predetermined motion to mechanismto be actuated, a locking bolt carried by said driving memberand movableto and from a position affording a driving connection betweenv saiddriving member and the mechanism to be actuated thereby, a key operablelock cylinder in the driving member, anda connection. between the lockcylinder and the locking bolt for moving the locking bolt to and fromits operative position by rotation of the cylinder, said connectionincluding a frangible part adapted to give way under a percussive forcesovthat said connection is rendered incapable of transmitting movementto the locking bolt.

7. In a lock of the character described, a'key operable lock cylinder,'a locking bolt, a connection between the cylinder and the boltcomprising a stein rigidly connected with the cylinder, a collar on thestem having an eccentric cam engaged with the bolt and operablel to movethe bolt endwise movable locking bolt, a key operable lock Polt'- 8; Ina lock o! the character described, a member bored to provide)a lockhousing, a locking bolt movably mounted in said member, a lock cylinderrotatable and longitudinally movable in said bore, and a connectionbetween the lock cylinder and the boit` comprising a stem rigidlyconnected with the cylinder, a part mounted on the stein locking bolt sothat rotation of the cylinder and stem transmits axial motion to thelocking bolt, a irangible connection between said part and the stem, andsaid part being held against inwardxendwise movement with respect to.the housing member independently of the stem so that upon theapplication ot a percussive force on the end of the cylinder saidfrangible connection is broken and the connection between the cylinderand locking bolt is rendered incapable o1' transmitting motion from theformer to the latter.

9. In combination, a lock housing, a locking bolt slidable in thehousing, a key operable lock cylinder in the housing for actuating thebolt, a part carried by the cylinder and operable upon inward endwisemotion of the cylinder to secure the locking bolt against actuation, andmeans to normally prevent such inward endwise motion oi? the cylindercomprising a collar on said cylinder part rmly held against movement inan inward axial direction with respect to the cylinder, and irangiblemeans securing said collar to the cylinder part, said frangible meansbeing adapted to give way under a percussive force applied to thecylinder whereupon said cylinder part is shifted inwardly into operativeengagement with the locking bolt. f

10. In combination, a lock housing, a locking bolt sli'dable in thehousing, a key operable lock cylinder in the housing for actuating thebolt, a part carried by the cylinder and operable upon inward endwisemotion of the Vcylinderto secure the locking bolt against actuation, andmeans to normally prevent such inward endwise motion of the cylindercomprising a collar on said cylinder part firmly held against movementin an inward axial direction with respect to the cylinder, frangiblemeans securing said collar to the cylinder part, said frangible meansbeing adapted to give way under a percussive force applied to thecylinder whereupon said cylinder part is shifted inwardlyV intooperative engagement with the locking bolt, and means on the collatingrotation of the cylinder into siding movement of the locking bolt. y

11. In a lock, a member forming a lock housing, a key, operable lockcylinder mounted thereylar and engaged with the locking bolt forvtransin, a locking bolt movable in said member and operable by thecylinder, said locking bolt having a recess, cam means driven by thecylinder and engaged in said recess for actuating the bolt, and a partrigidly connected with the cylinder and projectable into said lockingbolt recess upon inward endwise movement of the cylinder to secure thebolt against actuation.

' 12. In a lock, a member forming a lock housing, a key operable lockcylinder mounted therein, a locking bolt movable in said member andoperable by the cylinder, said locking bolt' having a recess, cam meansdriven kby the cylinder and yengaged in said recess for actuating thebolt, and

apart rigidly connected with the cylinder and projectable into saidlocking bolt recess upon inward endwise movement of the cylinder tosecure the bolt against actuation, and means to prevent inward endwisemotion of the cylinder including a frangible part adapted to give wayunder a percussive force applied to the cylinder.

13. In combination with a door handleficr actuating a door latchingmechanism, a locking bolt slidably mounted in the handle and projectableto a position affording a driving connection between the handle andthemechanism to be actuated, a key operable lock cylinder mounted in thehandle, and a driving. connection between said cylinder and bolt wherebyrotation of the cylinder moves the locking bolt to and from itsoperative position, said connection including a' frangible part adaptedto give way' and disable saidr connection between the cylinder and thebolt.

' JOHN W. FITZ GERALD. v

